Lexmark C736 Service Manual

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Operator panel buttons removal
1.Remove the top access door cover assembly. See “Top access cover assembly removal” on 
page 4-40.
2.Turn the top access cover assembly over.
3.Remove the nine screws (A) securing the position guide.
4.Remove the four screws (B) from the operator panel card.
Note:  Observe the position of the ground cable (C). 

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5.Disconnect the operator panel cable (D).
6.Turn over the operator panel card.
Note:  Do not disconnect the display cables. Be sure not to put any pressure on the ribbon cable.
7.Remove the clear shield over the number pad.
8.Remove the buttons (E) from the top access door cover.
D
E 

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Output bin extension cover removal
See “Output bin extension cover” on page 7-3 for the part number.
1.Turn the printer around, so the back is toward you.
2.Rotate the output bin extension cover toward the front of the printer.
3.Use a flathead screwdriver to ease the posts from the holes on one side. 

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Paper tray dust cover removal
See “Dust cover assembly” on page 7-3 for the part number.
1.Remove the paper tray.
2.Remove the left cover. See “Left cover removal” on page 4-21.
3.Remove the paper tray dust cover assembly.
Installation notes:
1.Place the paper tray dust cover into position.
2.Slide the left cover down until it locks into place. 
Note:  Be sure the post in the left cover engages the hole in the left cover, and that the post in the paper...

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Rear frame cover removal
See “Rear frame cover” on page 7-3 for the part number.
1.Remove paper tray
2.Loosen the eight screws (A) on the rear frame cover. 
Note:  Do not remove the screws.
3.Lift up on the rear frame cover to remove it from the back of the printer.
A 

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Rear left cover removal
1.Remove the left cover. See “Left cover removal” on page 4-21.
2.Separate the left cover and rear left cover by sliding the left rear cover as shown to disengage the latch (A). 

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Rear right cover removal
See “Rear right cover” on page 7-3 for the part number.
1.Remove the right cover. See “Right cover removal” on page 4-37. 
2.Press the two tabs (A) to separate the right cover from the rear right cover.
A 

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Rear upper cover removal
1.Remove the two screws (A).
2.Slide the cover up and remove the rear upper cover.
Note:  If you are removing the rear upper cover to access another part, leave the cooling fan filter attached, and 
you are done. If you need to replace the rear upper cover FRU, continue with the next step to remove the 
cooling fan filter FRU.
3.Remove the cooling fan filter. See “Cooling fan filter removal” on page 4-75. 

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Right cover removal
See “Right cover” on page 7-3 for the part number.
1.Remove the power cord from the printer.
2.Remove the paper tray.
3.Remove the rear upper cover. See “Rear upper cover removal” on page 4-36.
4.Open the front cover.
5.Open the top access cover.
6.Remove the two screws (A) on the inside front.
7.Remove the metal screw (B) on the inside front.
B 

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8.Remove the three screws (C).
9.Lift the bottom of the cover out, pull up at the points shown, and remove the cover.
Note:  There are posts on the top access cover and the paper tray dust cover (D). When you reinstall, be 
sure to verify that the top access cover opens correctly and that the paper tray dust cover swings properly.
10.Remove the paper tray dust cover (E).
Note:  If you are removing the right cover to access another part, leave the right...